From what I’ve read there aren’t many that are up to kicking over a 4 cylinder diesel, let alone a 6. I ended up throwing a dual purpose, cranking/deep cycle in my cruiser as an aux battery. That way if the cranking battery died, I could just hook them both up with jumper leads without adversly affecting the aux battery.

We bought a 'Matson' Brand 12/24v MA35000 Intelligent Jump Starter a couple of years back. It's supposed to deliver 600A @12v starting power, and up to 1200A Peak, though I doubt it'll do so for long.. Pretty sure it cost around $340, and we bought it through the local engineering/steel supplies shop.

We needed something that had enough grunt to start the backhoe, which although a 12v system, seems a lot more reluctant to turn over than your average Landcruiser 1HZ motor...Something to get an auto electrician to investigate, at some stage.

This unit came in a 3/4-sized briefcase, and the unit itself is about 30cmsx30cmsx8cms, so not the smallest of these units.I had the same issue; needed something with enough grunt to turn over a larger diesel motor.It has a couple of USB ports for charging phones, and also a cigarette light outlet, so could likely power a laptop, with the appropriate power supply.

We made a mistake, and let this thing go completely flat, as we hadnt used it for a good while (~6 months?). I dont think the Li-Ion batteries like that, and it seems to discharge very fast ever since.It has started the backhoe on a couple of cold days, so probably has paid for itself. but it refused to turn the backhoe over last week, after having come off a full charge(screen states 100% charged). Overseer reports it turned the backhoe over sluggishly, but when he tried the second time, the jump-starter unit was saying it had 0% charge remaining!Overseer ended up simply using his Hilux to jump-start the backhoe, so somewhat annoying it seems to be failing so quickly.

A mate has one of the smaller units in his Ford Territory, and it's saved his bacon a few times. However, the motor in his car is (I think) a 2.5 diesel, so doesnt need an overly big unit to turn over.

So, I'm a bit nonplussed about them. In our case, a portable jump-starter is pretty useful, as we have a number of vehicles that might need a boost to start. But I'm not yet able to say I've found one that is rock-solid reliable every time we've needed one.

---------------------Sharing the extreme love with cats in Outback QLD

For biggish desiels, having a second battery is probably a far more reliable and versatile option. They can be wired in with a jump switch so if you want to use your second battery to support your primary crank battery, it can be done at the push of a button from the driver's seat without having to worry about jump cables and power spikes, or the booster unit being flat when you really need it.

I drain the battery of my quad when I’m spotlighting all the time sometimes 15 k from my quarters in the middle of the night I carry the biggest jump pack I can buy from super cheap. That late when I’m tired I feel real good about lugging it around when my quad starts to falter .....I feel better knowing I’ll be right rather than hoping a jump pack the size of a cigarette packet will get me started again

I have a Jump go diesel X8, I bought it from Forbes batteries in Toowoomba about 5 years ago, it is still going strong and holds it's charge very well, it will start a V8 landcruiser diesel, it fits in a pack about 7 x 9 x 2.5 inches, can't fault it.

Blr243 wrote:.I feel better knowing I’ll be right rather than hoping a jump pack the size of a cigarette packet will get me started again

Maybe the old saying,, "Size really does matter"

I'm a bit old fashioned and just have the same as someone already said,,,,, The biggest jump starter pack from Supercheap.I think the secret is to store them somewhere that you can't avoid seeing on a regular basis, and regularly top up their charge. Mines never let me down so far, and is used on the old 75 Series 4.2 as well as tractors.

Even the sexiest looking jump starter contains a battery only a fraction of the size of your normal battery.They are OK to help a 'weak' battery start a motor but are out of their depth when it's time to overcome a dead flat battery or a failed battery.In the case of a dead flat battery your jump starter is trying to recharge your flat battery as well as start your motor. In the case of a completely dead battery the small capacity of the jump starter battery as well as the limitations of their usual leads and clips means starting will be a 'hail mary' proposition.In many cases a set of heavy duty jumper leads, a sealed normal size battery to suit your vehicle and a smart charger to keep it topped up are a safer proposition.Probably won't cost much more and will be vastly more flexible in use.

"There is no expedient to which a man will not resort to avoid the real labor of thinking." Sir Joshua Reynolds

With 8 services that have car batteries, I know what you saying, but for casual low battery a small portable lithium jump start is just awesome, had an ebay one that a worker fkd up, but it priceless, I do have a battery charger and a jump start cable.

straightshooter wrote:Even the sexiest looking jump starter contains a battery only a fraction of the size of your normal battery.They are OK to help a 'weak' battery start a motor but are out of their depth when it's time to overcome a dead flat battery or a failed battery.In the case of a dead flat battery your jump starter is trying to recharge your flat battery as well as start your motor. In the case of a completely dead battery the small capacity of the jump starter battery as well as the limitations of their usual leads and clips means starting will be a 'hail mary' proposition.In many cases a set of heavy duty jumper leads, a sealed normal size battery to suit your vehicle and a smart charger to keep it topped up are a safer proposition.Probably won't cost much more and will be vastly more flexible in use.

With a dead battery, it is better to disconnect it completely, then start with another battery or jump starter, then reconnect to drive the vehicle to where the battery can be replaced, (if away from where a replacement battery is available).

I blew both batteries in a 24 v Scania 620 at Camooweal on the way back from the NT, they were only 12 months old, but 43 deg heat for days and the corrugations on the Tanami probably did not help their future, no chance of replacing them at Camooweal, I had to completely disconnect them, before I could start it with a couple of borrowed batteries, once started, the dead ones were reconnected then to the Isa for a couple of new ones.

I do a few solo trips in my 3.0l hilux and I went into BatteryWorld and after a chat walked out with one - knowing its in the ute is just piece of mind. I tested it with the battery completely disconnected and it worked.

The bloke at battery world said when they get called out for emergency battery faults they use the small jump packs too. I use it to charge my phone etc. and keep it topped up with the lighter adapter.